But what exactly can a faint line mean? Verkkounlike a faint positive result, which will result in a light pink or blue line, an evaporation line does not activate the dye in the pregnancy test. Verkkopaper test strips detect a hormone called human chorionic gonadotropin, which is produced during pregnancy. The test strip is treated with a chemical that changes. Verkkoa line that's supposed to be red may appear light pink, for example, and a line that is supposed to look blue if positive will be very light blue. Possible meanings of a. But, it can also mean the test wasn't taken properly, so. Verkkoa faint line on a pregnancy test typically means that the level of hcg (human chorionic gonadotropin) detected in the urine is low, which is why the line. These lines usually show up.